2 Houjicha questions

Hullo,Is Houjicha truly lower caffeine than other teas? I've seen this several places, including one thread here, but I haven't seen this substantiated except in a single study with a single brand of Houjicha. And if so, do we know how much lower?

Also, I'm looking at Den's organic Houjicha. Any experiences here with it? Are there other organic Houjichas anyone would recommend?My wife wants to stick to organic while pregnant...

Thanks for the article.Still it doesn't deny that roasting decreases caffeine content, read line 5.Although buds and higher leaves have more caffeine than lower leaves, at later flushes overall caffeine levels increase.

The article talks about roasting coffee beans and how they lose water content, so that weight and volume is different in light roast vs dark roast.However, houjicha is made by roasting bancha, which was dry to begin with, so I can't imagine how the weight vs volume problem would apply here, especially since we aren't comparing roasts.The fact is that roasting decreases caffeine content in tea leaves. To what extent is another issue.